Numerical simulation of electrical explosions in megagauss magnetic fields

5th International Congress on Energy Fluxes and Radiation Effects 2016

Oreshkin, V.I.^1,2 ; Chaikovsky, S.A.^1,3,5 ; Khishchenko, K.V.^4 ; Oreshkin, E.V.^5

Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, Akademichesky Avenue 2/3, Tomsk

634055, Russia^1

National Research Tomsk Polytechnical University, Lenin Avenue 30, Tomsk

634050, Russia^2

Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Amundsen 106, Ekaterinburg

620016, Russia^3

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^4

Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Avenue 53, Moscow

119991, Russia^5

关键词: A-plane;    Absolute values;    Cylindrical geometry;    Electrical explosion;    Magnetohydrodynamic simulations;    Metal conductor;    Plasma formations;    Rate of rise;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012029/pdf
DOI  :  10.1088/1742-6596/830/1/012029

来源: IOP

【 摘 要 】

The paper reports on a magnetohydrodynamic simulation of electrical explosions of conductors in megagauss magnetic fields. It is shown that in a plane geometry, the time of plasma formation at the surface of a metal conductor does not depend on the rate of rise of the magnetic field and is determined by the properties of the metal; the absolute values of the magnetic field at which plasma is formed are 5±0.25 MGs for copper, 4.25±0.2 MGs for tungsten, 3.85±0.15 MGs for aluminum, and 3.6±0.25 MGs for titanium. In cylindrical geometry, the time of plasma formation does depend on the rate of field rise.